Abstract: An object of the present invention is to provide a device for installing a retaining ring on a shaft which can reduce the labor intensity of workers. The device for installing a retaining ring on a shaft comprises an expansion assembly. The expansion assembly includes a shell. A push block is movably fixed in the shell. Two expansion members that are symmetrical left and right are arranged in front of the push block. The expansion members include expansion portions that are located outside the shell and extend outward. Rear ends of the expansion portions are expansion portion first sections. The expansion members comprise a left expansion member on the left side and a right expansion member on the right side. The left end face of the expansion portion first section of the left expansion member is a slope extending leftward from rear to front. The push plate moves in a front-rear direction so that the expansion portions of the two expansion members move left and right, respectively.

Abstract: The present disclosure relates to systems and methods for object recognition. The systems may obtain an image associated with an object. The systems may determine, using a recognition model, an initial recognition result of the object based on the image. The initial recognition result may include a plurality of initial recognition values corresponding to a plurality of predetermined categories respectively. Each of the plurality of initial recognition values may indicate an initial probability that the object corresponds to a corresponding predetermined category. In response to determining that the initial recognition result satisfies a preset condition, for each of the plurality of predetermined categories, the systems may obtain a reference probability corresponding to the predetermined category.

Abstract: An object of the present invention is to provide a device for installing a retaining ring on a shaft which can reduce the labor intensity of workers. The device for installing a retaining ring on a shaft comprises an expansion assembly. The expansion assembly includes a shell. A push block is movably fixed in the shell. Two expansion members that are symmetrical left and right are arranged in front of the push block. The expansion members include expansion portions that are located outside the shell and extend outward. Rear ends of the expansion portions are expansion portion first sections. The expansion members comprise a left expansion member on the left side and a right expansion member on the right side. The left end face of the expansion portion first section of the left expansion member is a slope extending leftward from rear to front. The push plate moves in a front-rear direction so that the expansion portions of the two expansion members move left and right, respectively.

Abstract: The invention discloses a retrievable sand consolidation anchor head prestressed anchor rod, an anchoring jack and an application method thereof, and belongs to the technical field of geotechnical engineering. The retrievable sand-consolidated anchor head pre-stressed anchor includes a bolt body 6, a rigid frame 5, a load member 1, a sand column 2, a pressure receiving member 4, a cut-off member 3, and an anchor pier 8. The anchoring jack includes a force transmitting frame 12, a first guiding plate 25, a second guiding plate 28, and a housing 13. The application method includes an anchoring method using the retrievable sand-consolidated anchor head prestressed anchor rod and a method of recovering the retrievable sand-consolidated anchor head pre-stressed anchor rod. After the anchoring of the reclaimed sand-consolidated anchor head pre-stressed anchor rod, the bolt body can be recovered and reused, and the operation is simpler and more environmentally friendly.

Abstract: The invention discloses a retrievable sand consolidation anchor head prestressed anchor rod, an anchoring jack and an application method thereof, and belongs to the technical field of geotechnical engineering. The retrievable sand-consolidated anchor head pre-stressed anchor includes a bolt body 6, a rigid frame 5, a load member 1, a sand column 2, a pressure receiving member 4, a cut-off member 3, and an anchor pier 8. The anchoring jack includes a force transmitting frame 12, a first guiding plate 25, a second guiding plate 28, and a housing 13. The application method includes an anchoring method using the retrievable sand-consolidated anchor head prestressed anchor rod and a method of recovering the retrievable sand-consolidated anchor head pre-stressed anchor rod. After the anchoring of the reclaimed sand-consolidated anchor head pre-stressed anchor rod, the bolt body can be recovered and reused, and the operation is simpler and more environmentally friendly.

Abstract: The present invention relates to a landing-door door lock device. The following problem is solved: the position of a lock ball of a general landing-door door lock device is not adjustable, and adjustment is complicated when there is a deviation between positions of the lock ball and a door knife.

Abstract: The present invention discloses a root key type pressure bearing mechanism in an anchor hole, a root key type anchor cable and an anchor hole grouting method. The pressure bearing mechanism includes a carrier, root keys and a tapered plug, a through hole is formed in the center of the tapered plug, a taper hole is formed in the center of the carrier, key holes are formed along a radial direction of the carrier with an inner wall of the taper hole as a starting point, the number of the key holes is the same as that of the root keys, the root keys and the key holes constitute sliding pairs, an outer wall of the tapered plug is adapted to the taper hole, the sum of the length of the root key and the radius of a position corresponding to the tapered plug is larger than the radius of the anchor hole, and the length of the root key is less than the radius of the anchor hole; and when the tapered plug is plugged into the taper hole, the head of the root key stretches into a rock mass of the anchor hole.

Abstract: The present invention relates to a landing-door door lock device. The following problem is solved: the position of a lock ball of a general landing-door door lock device is not adjustable, and adjustment is complicated when there is a deviation between positions of the lock ball and a door knife.

Abstract: The present invention discloses a root key type pressure bearing mechanism in an anchor hole, a root key type anchor cable and an anchor hole grouting method. The pressure bearing mechanism includes a carrier, root keys and a tapered plug, a through hole is formed in the center of the tapered plug, a taper hole is formed in the center of the carrier, key holes are formed along a radial direction of the carrier with an inner wall of the taper hole as a starting point, the number of the key holes is the same as that of the root keys, the root keys and the key holes constitute sliding pairs, an outer wall of the tapered plug is adapted to the taper hole, the sum of the length of the root key and the radius of a position corresponding to the tapered plug is larger than the radius of the anchor hole, and the length of the root key is less than the radius of the anchor hole; and when the tapered plug is plugged into the taper hole, the head of the root key stretches into a rock mass of the anchor hole.